Sofia, Melanie, Amanda, and August von Trapp are the actual great grandchildren of Baron & Maria von Trapp, made famous by the 1965 film The Sound of Music. These siblings (ages 18 25) have been singing together for 12 years, and have toured all over the world in concert. Drawn into the magical orbit of Thomas Lauderdale, they now live together in a house in Portland, Oregon and have been frequent guest performers with Pink Martini for the past two years.